Trying to update the universal Forwarder from 7.1.1 to 7.3.1. First step it tries to uninstall the old version and needs the .msi to do it. I provide the location and it errors stating that it is not the correct forwarder even though the name matches that requested.
You don't have to unistall old version for UF upgradation, you can install new version on top of the old version.
You can download the new version and doubleclick it, it will install new version and installation log will be updated in C:\TEMP
If you wish to do it using cmd line,
msiexec.exe /i <path to downloaded file>\splunkforwarder-7.3.1-bd63e13aa157-x64-release.msi